Who’s in the room

Goals in the room

Commonalities

No matter what you want to do, you need to get comfortable with a few basics first:

• Getting data into R
  
• Making sure your data frame looks right
  
• Working with the data:
  • Taking a subset
    
  • Summarizing
    
  • Re-shaping
    
  • Connecting one data frame to another

Topics

• Background and vocabulary
  
• CODING - working with SWMP data
  • learning about the code as we do things
    
  • Sticky notes - pink for “please come help me”; blue for “I successfully accomplished the task”
• Moving forward

Remember

And sometimes

Tips

• Be gentle with yourself
  
• Be persistent
  
• Help your neighbor
  
• Look for commas and parentheses/brackets first - either missing or extra
  
• Spelling and other punctuation next

File Types & getting meta about these slides

(so you can take notes in the R files that generated them, and render a complete document for yourself later)

• .RProj - Project and how to open
  
• .R - the basic “R script”
  
• .Rmd - “RMarkdown”
  
• .qmd - “Quarto”
  

Vocabulary

• function
  
• package
  • CRAN
    
  • GitHub
    
  • others
• project
• working directory and file paths
  • getwd()/setwd()
    
  • here::here()
    

Punctuation vocabulary

• '   Single quote
  
• "   Double quote
  
• ```   Backticks
  
• /   Forward Slash
  
• \   Backslash
  
• ()  Parentheses
  
• []  Square brackets
  
• {}  Curly braces

RStudio IDE

• global settings
• panes
  
• using the Environment pane to explore your workspace

Key “operators” in code

• assignment operator: <-
  
• pipe: |> or %>%
  
• comments: #

Useful keyboard shortcuts

• run a line of code: Ctrl/Cmd + Enter
  
• make the assignment operator (<-): Alt + -
  
• make a pipe (|>): Ctrl/Cmd + Shift + M
• see more in RStudio’s ‘Tools’ menu; ‘Keyboard Shortcuts Help’

Subsetting operators

• $    —   df$column.name
  
• [rows, columns]   —   df[1:6, 1:2]
  
• dplyr::select()   —   select(df, column.name1, column.name2)
  
• dplyr::filter()   —   filter(df, year >= 2015)